The mosque, erected by Moslems from Bosnia, Caesarea, a town built by Herod the Great about 25 - 13 BC, lies on the sea-coast of Israel about halfway between Tel Aviv and Haifa, Remains of all the principal buildings erected by Herod existed down to the end of the 19th century. Remains of the medieval town are also visible, consisting of the walls (one-tenth the area of the Roman city), the castle, the site of the modest Crusader cathedral and church.